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8 h 14 juill. 2003 ans - Baby's lungs develop

Description:

your baby's lungs are beginning to produce surfactant, the substance that allows the air sacs in the lungs to inflate — and keeps them from collapsing and sticking together when they deflate.

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ByMarcos Abreo
7 déc. 2017
0
0
292

Date:

8 h 14 juill. 2003 ans
Maintenaint
~ Il y a 20 ans
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